package com.bitdf.txing.search.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.TypeReference;
import com.bitdf.txing.common.to.es.SkuEsModel;
import com.bitdf.txing.common.utils.R;
import com.bitdf.txing.search.config.TxElasticConfig;
import com.bitdf.txing.search.constant.EsConstant;
import com.bitdf.txing.search.feign.EsProductFeignService;
import com.bitdf.txing.search.service.MallProductSearchService;
import com.bitdf.txing.search.vo.AttrResponseVo;
import com.bitdf.txing.search.vo.SearchParam;
import com.bitdf.txing.search.vo.SearchResult;
import org.apache.lucene.search.join.ScoreMode;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.index.query.BoolQueryBuilder;
import org.elasticsearch.index.query.NestedQueryBuilder;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.index.query.RangeQueryBuilder;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.aggregations.AggregationBuilders;
import org.elasticsearch.search.aggregations.bucket.nested.NestedAggregationBuilder;
import org.elasticsearch.search.aggregations.bucket.nested.ParsedNested;
import org.elasticsearch.search.aggregations.bucket.terms.ParsedLongTerms;
import org.elasticsearch.search.aggregations.bucket.terms.ParsedStringTerms;
import org.elasticsearch.search.aggregations.bucket.terms.Terms;
import org.elasticsearch.search.aggregations.bucket.terms.TermsAggregationBuilder;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightField;
import org.elasticsearch.search.sort.SortOrder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;

@Service
public class MallProductSearchServiceImpl implements MallProductSearchService {
    @Autowired
    private RestHighLevelClient client;
    @Autowired
    EsProductFeignService productFeignService;
    @Override
    public SearchResult search(SearchParam param) {
        SearchResult result=null;
        SearchRequest searchRequest = bulidSearchRequest(param);
        try{
            SearchResponse response = client.search(searchRequest, TxElasticConfig.COMMON_OPTIONS);
            result=bulidSearchResult(response,param);

        }catch (IOException e)
        {
            e.printStackTrace();
        }
        return result;
    }

    private SearchResult bulidSearchResult(SearchResponse response,SearchParam param) {
        SearchResult result = new SearchResult();
        SearchHits hits = response.getHits();
        List<SkuEsModel> esModels=new ArrayList<>();
        if (hits.getHits() != null && hits.getHits().length > 0) {
            for (SearchHit hit : hits.getHits()) {
                String sourceAsString = hit.getSourceAsString();
                SkuEsModel esModel = JSON.parseObject(sourceAsString, SkuEsModel.class);
                if (!StringUtils.isEmpty(param.getKeyword()))
                {
                    HighlightField skuTitle = hit.getHighlightFields().get("skuTitle");
                    String string = skuTitle.getFragments()[0].string();
                    esModel.setSkuTitle(string);
                }
                esModels.add(esModel);
            }
        }
        result.setProducts(esModels);

        //2.当前所有商品涉及到的所有属性信息
        List<SearchResult.AttrVo> attrVos=new ArrayList<>();
        ParsedNested attr_agg = response.getAggregations().get("attr_agg");
        ParsedLongTerms attr_id_agg = attr_agg.getAggregations().get("attr_id_agg");
        for (Terms.Bucket bucket : attr_id_agg.getBuckets()) {
            SearchResult.AttrVo attrVo = new SearchResult.AttrVo();
            long attrId = bucket.getKeyAsNumber().longValue();
            String attrName  = ((ParsedStringTerms) bucket.getAggregations().get("attr_name_agg")).getBuckets().get(0).getKeyAsString();
            List<String> attrValues= ((ParsedStringTerms) bucket.getAggregations().get("attr_value_agg")).getBuckets().stream().map(item -> {
                String keyAsString = item.getKeyAsString();
                return keyAsString;
            }).collect(Collectors.toList());
            attrVo.setAttrId(attrId);
            attrVo.setAttrName(attrName);
            attrVo.setAttrValue(attrValues);

            attrVos.add(attrVo);

        }
        result.setAttrs(attrVos);

        //聚合分析
        //1.品牌聚合
        List<SearchResult.BrandVo> brandVos=new ArrayList<>();
        ParsedLongTerms brand_agg = response.getAggregations().get("brand_agg");
        for (Terms.Bucket bucket : brand_agg.getBuckets()) {
            SearchResult.BrandVo brandVo = new SearchResult.BrandVo();
            long brandId = bucket.getKeyAsNumber().longValue();
            if (((ParsedStringTerms) bucket.getAggregations().get("brand_name_age")).getBuckets().size() > 0) {
                String brandName = ((ParsedStringTerms) bucket.getAggregations().get("brand_name_age")).getBuckets().get(0).getKeyAsString();
                brandVo.setBrandName(brandName);
            }
            if (((ParsedStringTerms) bucket.getAggregations().get("brand_img_agg")).getBuckets().size() > 0) {
                String brandImg = ((ParsedStringTerms) bucket.getAggregations().get("brand_img_agg")).getBuckets().get(0).getKeyAsString();
                brandVo.setBrandImg(brandImg);
            }
            brandVo.setBrandId(brandId);
            brandVos.add(brandVo);
        }
        result.setBrands(brandVos);

        //2.分类聚合
        ParsedLongTerms catalog_agg = response.getAggregations().get("catalog_agg");
        List<SearchResult.CatalogVo> catalogVos=new ArrayList<>();
        List<? extends Terms.Bucket> buckets = catalog_agg.getBuckets();
        for (Terms.Bucket bucket : buckets) {
            SearchResult.CatalogVo catalogVo = new SearchResult.CatalogVo();
            String keyAsString = bucket.getKeyAsString();
            catalogVo.setCatalogId(Long.parseLong(keyAsString));
            ParsedStringTerms catalog_name_agg = bucket.getAggregations().get("catalog_name_agg");
            String catalog_name = catalog_name_agg.getBuckets().get(0).getKeyAsString();
            catalogVo.setCatalogName(catalog_name);
            catalogVos.add(catalogVo);
        }
        result.setCatalogs(catalogVos);


        //5.当前所有商品涉及到的所有分页信息
        //页码
        result.setPageNum(param.getPageNum());
//        result.setPageNum();
        //总计录数
        long total = hits.getTotalHits().value;
        result.setTotal(total);
        //总页码
        Long totalPages = total % EsConstant.PRODUCT_PAGESIZE == 0 ? total / EsConstant.PRODUCT_PAGESIZE : (total / EsConstant.PRODUCT_PAGESIZE) + 1;
        result.setTotalPage(totalPages);

        List<Integer> pageNavs=new ArrayList<>();
        for (int i=1;i<=totalPages;i++)
        {
            pageNavs.add(i);
        }
        result.setPageNavs(pageNavs);

        if (param.getAttrs()!=null&&param.getAttrs().size()>0)
        {
            List<SearchResult.NavVo> collect = param.getAttrs().stream().map(attr -> {
                SearchResult.NavVo navVo = new SearchResult.NavVo();
                String[] s = attr.split("_");
                navVo.setNavValue(s[1]);
                R r = productFeignService.attrInfo(Long.parseLong(s[0]));
                result.getAttrIds().add(Long.parseLong(s[0]));
                if(r.getCode()==0)
                {
                    AttrResponseVo data = r.getData("attr", new TypeReference<AttrResponseVo>(){});
                    navVo.setNavName(data.getAttrName());
                }else {
                    navVo.setNavName(s[0]);
                }
                String replace = replaceQueryString(param, attr, "attrs");
                navVo.setLink("http://114.132.160.50/search/list.html?"+replace);

                return navVo;
            }).collect(Collectors.toList());
            result.setNavs(collect);
        }
        //品牌，分类
        if(param.getBrandId()!=null&&param.getBrandId().size()>0){
            List<SearchResult.NavVo> navs = result.getNavs();
            SearchResult.NavVo navVo = new SearchResult.NavVo();
            navVo.setNavName("品牌");
            R r = productFeignService.brandsInfo(param.getBrandId());
            if (r.getCode()==0)
            {
                List<SearchResult.BrandVo> brand = r.getData("brand", new TypeReference<List<SearchResult.BrandVo>>() {
                });
                StringBuffer buffer=new StringBuffer();
                String replace="";
                for (SearchResult.BrandVo brandVo : brand) {
                    buffer.append(brandVo.getBrandName()+";");
                    replace = replaceQueryString(param, brandVo.getBrandId()+"","brandId");
                }
                navVo.setNavValue(buffer.toString());
                navVo.setLink("http://114.132.160.50/search/list.html?"+replace);
            }
            navs.add(navVo);

        }
        return result;

    }

    private String replaceQueryString(SearchParam param,String value,String key)
    {
        if (param.get_queryString() == null) {
            return "";
        }
        String encode=null;
        try{
            encode = URLEncoder.encode(value, "UTF-8");
            encode=encode.replace("+", "%20");
        }catch (UnsupportedEncodingException e){
            e.printStackTrace();
        }
        String replace = param.get_queryString().replace("&"+key+"=" + encode, "");
        return replace;
    }


    /**
     * 构建es检索请求
     * @param param
     * @return
     */
    private SearchRequest bulidSearchRequest(SearchParam param) {
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
        BoolQueryBuilder boolQuery = QueryBuilders.boolQuery();
        if (!StringUtils.isEmpty(param.getKeyword())){
            boolQuery.must(QueryBuilders.matchQuery("skuTitle",param.getKeyword()));
        }
        if(param.getCatalog3Id()!=null)
        {
            boolQuery.filter(QueryBuilders.termQuery("catalogId", param.getCatalog3Id()));
        }
        if (param.getBrandId()!=null&&param.getBrandId().size()>0){
            boolQuery.filter(QueryBuilders.termsQuery("brandId", param.getBrandId()));
        }
        if(param.getHasStock()!=null){
            boolQuery.filter(QueryBuilders.termQuery("hasStock", param.getHasStock()==1));
        }

        if (!StringUtils.isEmpty(param.getSkuPrice()))
        {
            RangeQueryBuilder rangeQuery = QueryBuilders.rangeQuery("skuPrice");
            String[] s = param.getSkuPrice().split("_");
            if (s.length==2)
            {
                rangeQuery.gte(s[0]).lte(s[1]);
            }
            else if(s.length==1){
                if(param.getSkuPrice().startsWith("_"))
                {
                    rangeQuery.lte(s[0]);
                }
                if(param.getSkuPrice().endsWith("_"))
                {
                    rangeQuery.gte(s[0]);
                }
            }
            boolQuery.filter(rangeQuery);
        }
        if (param.getAttrs()!=null&&param.getAttrs().size()>0)
        {
            for(String attrStr: param.getAttrs())
            {
                BoolQueryBuilder nestedboolQuery = QueryBuilders.boolQuery();
                String[] s = attrStr.split("_");
                String attrId = s[0];
                String[] attrValues = s[1].split(":");
                nestedboolQuery.must(QueryBuilders.termQuery("attrs.attrId", attrId));
                nestedboolQuery.must(QueryBuilders.termsQuery("attrs.attrValue", attrValues));
                NestedQueryBuilder nestedQuery = QueryBuilders.nestedQuery("attrs", nestedboolQuery, ScoreMode.None);
                boolQuery.filter(nestedQuery);
            }
        }
        sourceBuilder.query(boolQuery);

        if (!StringUtils.isEmpty(param.getSort())){
            String sort = param.getSort();
            String[] s = sort.split("_");
            SortOrder order=s[1].equalsIgnoreCase("asc")? SortOrder.ASC: SortOrder.DESC;
            sourceBuilder.sort(s[0],order);
        }

        sourceBuilder.from((param.getPageNum()-1)*EsConstant.PRODUCT_PAGESIZE);
        sourceBuilder.size(EsConstant.PRODUCT_PAGESIZE);

        if (!StringUtils.isEmpty(param.getKeyword())){
            HighlightBuilder builder = new HighlightBuilder();
            builder.field("skuTitle");
            builder.preTags("<b style='color:red'>");
            builder.postTags("</b>");
            sourceBuilder.highlighter(builder);
        }
        //聚合分析
        //1.品牌聚合
        TermsAggregationBuilder brand_agg = AggregationBuilders.terms("brand_agg");
        brand_agg.field("brandId").size(50);
        brand_agg.subAggregation(AggregationBuilders.terms("brand_name_age").field("brandName").size(1));
        brand_agg.subAggregation(AggregationBuilders.terms("brand_img_agg").field("brandImg").size(1));
        sourceBuilder.aggregation(brand_agg);
        //2.分类聚合
        TermsAggregationBuilder catalog_agg = AggregationBuilders.terms("catalog_agg").field("catalogId").size(20);
        catalog_agg.subAggregation(AggregationBuilders.terms("catalog_name_agg").field("catalogName").size(1));
        sourceBuilder.aggregation(catalog_agg);
        //3.属性聚合(嵌入式聚合)
        NestedAggregationBuilder attr_agg = AggregationBuilders.nested("attr_agg", "attrs");
        //聚合出当前所有的attr_id
        TermsAggregationBuilder attr_id_agg = AggregationBuilders.terms("attr_id_agg").field("attrs.attrId");
        //聚合分析当前attr_id对应的名字
        attr_id_agg.subAggregation(AggregationBuilders.terms("attr_name_agg").field("attrs.attrName").size(1));
        //聚合分析当前attr_id对应的所有可能的属性值attrValue
        attr_id_agg.subAggregation(AggregationBuilders.terms("attr_value_agg").field("attrs.attrValue").size(50));
        attr_agg.subAggregation(attr_id_agg);
        sourceBuilder.aggregation(attr_agg);

        String s = sourceBuilder.toString();
        System.out.println("DSL:" + s);

        SearchRequest searchRequest = new SearchRequest(new String[]{EsConstant.PRODUCT_INDEX}, sourceBuilder);
        return searchRequest;
    }
}
